MegaSap CEO called me today, and he declined to give me a job, maybe because I quote my salary too high. He said I should have some experience in Ruby and Rails first. So, I went online and check for some tutorials. I remembered CS50 Harvard University website has good seminars, so I went looking and I found this video.
Ruby on rails is a web apps framework, the skeleton to make web apps. I know roughly what is Ruby on rails now.